"The Day" is a single by South Korean singers K.Will and Baekhyun, member of South Korean boy group EXO.

[1] On May 9, 2016, SM shared a teaser photo with images of Baekhyun only for the collaboration.

On May 10, it was revealed via a teaser image that the artist that will collaborate with Baekhyun would be K.Will.

[2] Produced by Miss Kay and Kim Jae-hyung, "The Day" is described as a ballad song combined with acoustic guitar about yearning for a lost love.

[4] In it, a man is seen being confronted with happy memories from the past while regretting his decisions.